العُرْف لغةً: بضمّ العين، وهو ضدّ النُّكر (الإنكار)، وقد جاء أيضًا بمعنى المكان المرتفع، ومنه يُقال: «عُرْف الجبل» أي أعلاه المرتفع، ويُسمّى لحم رأس الديك عُرْفًا لارتفاعه على جسده.

Al-‘Urf linguistically means: With a Dammah on the ‘Ayn it is the opposite of An-Nukr (denial) and it has also come with the meaning of the elevated place where it is said ‘‘Urf ul-Jabal’ (the high or elevated place of the mountain) and the flesh of the head of the cockerel is called an ‘Urf due to its high position in respect to its body.